diff --git a/README.md b/README.md
index e1d861b..d91c8f1 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ We recommend installing hypersweeper via a uv virtual environment:
 ```bash
 pip install uv
 uv venv --python 3.10
+source .venv/bin/activate
 make install
 ```